4.7 Article

Distinct response patterns of bacterial communities in Ag- and ZnO-rGO nanocomposite-amended silt loam soils

Journal

SCIENCE OF THE TOTAL ENVIRONMENT
Volume 810, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.scitotenv.2021.151270

Keywords

Reduced graphene oxide; Metal-based nanoparticles; Bacterial community; Soil

Funding

  1. National Natural Science Foundation of China [41771296]
  2. Talent Introduction Startup Fund of Northwest A&F University of China

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The widespread application of metal-based nanoparticle (MNPs)/reduced graphene oxide (rGO) composites can lead to the release of these materials into soils, impacting bacterial communities. Ag-rGO and ZnO-rGO were found to have a significant effect on the structure of bacterial communities in farmland soils.
The widespread application of metal-based nanopartide (MNPs)/reduced graphene oxide (rGO) composites inevitably leads to their release into soils. However, we lack a detailed understanding of the bacterial community response to MNPs-rGO exposure in farmland soils. Here, we conducted a soil microcosm experiment to analyze the potential impact of MNPs-rGO on bacterial communities in two field soils via high-throughput sequencing. The change in alpha diversity of bacterial communities was more susceptible to Ag-rGO and ZnO-rGO treatments than CuO-rGO. In both soils, MNPs-rGO significantly changed the bacterial community structure even at a low dose (1 mg kg(-1)). The bacterial community structure was most strongly affected by Ag-rGO at 30 days, but the greatest changes occurred in ZnO-rGO at 60 days. The differences in soil properties could shape bacterial communities to MNPs-rGO exposure. Distance-based redundancy analysis and functional annotation of prokaryotic taxa showed that some bacterial species associated with nitrogen cyding were greatly influenced by Ag-rGO and ZnO-rGO exposure. In sum, Ag-rGO and ZnO-rGO may potentially affect bacterial communities and nitrogen turnover under long-term realistic field exposure.These findings present a perspective on the response of bacterial communities to MNPs-rGO and provide a fundamental basis for estimating the ecological behavior of MNPs-rGO. (C) 2021 Published by Elsevier B.V.

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